The most common and most likely answer to this crossword clue is the 7 letter word BONJOUR
B
O
N
J
O
U
R
Buddy explains!
The straight part
We know that "9" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case 9 = bonjour.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does BONJOUR mean?
BONJOUR verb- To greet in French with "bonjour".
- (in French contexts) good morning